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Coupled trickling filter-rotating biological contractor nitrification process [Wastewater treatment for prevention of fish toxicity].
1981
Marsh D. | Benefield L. | Bennett E. | Linstedt D. | Hartman R.
Anaerobic activated carbon filter for the treatment of phenol-bearing wastewater [Fish toxicity].
1981
Khan K.A. | Suidan M.T. | Cross W.H.
Viral transport to ground water at a wastewater land application site [Use for irrigation purposes].
1981
Moore B.E. | Sagik B.P. | Sorber C.A.
Environmental factors influencing the rate of spread of the grass Deschampsia cespitosa invading areas around the Sudbury nickel-copper smelters [Ontario].
1981
Cox R.M. | Hutchinson T.C.
Computerized biological monitoring for demonstrating wastewater discharge.
1981
Gruber D. | Cairns J. Jr. | Hendricks A.C.
Sludge treatment/handling, preliminary treatment, and instrumentation top OandM [operation and maintenance] problem list.
1981
Hadeed S.J.
Stability of activated sludge processes based on statistical measures.
1981
Niku S. | Schroeder E.D.
Deposition of sulphur gases from multiple scattered sources in Alberta [Canada].
1981
Walker D.R. | Dick A.C. | Nyborg M.
Various measurements utilizing soils, plants, precipitation and free water surfaces indicate that approximately 7 to 9 kg/ha of sulphate S was deposited annually within an area of 4600 km('2). This area contained or had adjacent to its boundaries 10 S emission sources for which the provincial government had established a combined allowable daily emission of approximately 330 tonne S. At distance of 40 or more km from the emission sources the annual deposition rate had declined to 4 to 6 kg/ha.
Show more [+] Less [-]Characterization of air pollutants from an activated sludge process.
1981
Scheff P.A. | Holden J.A. | Wadden R.A.
Role of ascorbic acid in the toxicity of pesticides in a fresh water teleost.
1981
Verma S.R. | Tonk I.P. | Gupta A.K. | Dalela R.C.
The effect of ascorbic acid and pesticides (thiotox and malathion) on certain haematological parameters of a fish Saccobranchus fossilis was studied. The sublethal concentrations of thiotox (0.002 mg/l) and of malathion (5.2 mg/l) were tested. Ascorbic acid (2 mg/100 g body weight) was given with food. The alterations in haematological parameters (CT, PT, Hb, RBC, WBC, ESR, PCV, MCH, MCHC, MCV, glucose, protein, total P, Na, K, Mg, Ca, and Cl) were measured after 15 and 30 days exposure. Thiotox and malathion induced significant alteration in blood parameters while ascorbic acid played a protective role.
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